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add randomSeed assss optional paramter to hint functions

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This commit is contained in:
Edward Mulraney 2021-06-26 11:31:34 +01:00
parent 4df8b8bf56
commit b471eab625
2 changed files with 157 additions and 151 deletions
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10
contracts/protocols/mainnet/liquity.sol
View File

@ -167,18 +167,19 @@ contract Resolver is Helpers {
return System(borrowFee, ethTvl, tcr, isInRecoveryMode);
}
function getTrovePositionHints(uint collateral, uint debt, uint searchIterations) external view returns (
function getTrovePositionHints(uint collateral, uint debt, uint searchIterations, uint randomSeed) external view returns (
address upperHint,
address lowerHint
) {
// See: https://github.com/liquity/dev#supplying-hints-to-trove-operations
uint nominalCr = hintHelpers.computeNominalCR(collateral, debt);
searchIterations = searchIterations == 0 ? mul(10, sqrt(sortedTroves.getSize())) : searchIterations;
(address hintAddress, ,) = hintHelpers.getApproxHint(nominalCr, searchIterations, 3);
randomSeed = randomSeed == 0 ? block.number : randomSeed;
(address hintAddress, ,) = hintHelpers.getApproxHint(nominalCr, searchIterations, randomSeed);
return sortedTroves.findInsertPosition(nominalCr, hintAddress, hintAddress);
}
function getRedemptionPositionHints(uint amount, uint oracleEthPrice, uint searchIterations) external view returns (
function getRedemptionPositionHints(uint amount, uint oracleEthPrice, uint searchIterations, uint randomSeed) external view returns (
uint partialHintNicr,
address firstHint,
address upperHint,
@ -187,7 +188,8 @@ contract Resolver is Helpers {
// See: https://github.com/liquity/dev#hints-for-redeemcollateral
(firstHint, partialHintNicr, ) = hintHelpers.getRedemptionHints(amount, oracleEthPrice, 0);
searchIterations = searchIterations == 0 ? mul(10, sqrt(sortedTroves.getSize())) : searchIterations;
(address hintAddress, ,) = hintHelpers.getApproxHint(partialHintNicr, searchIterations, 3);
randomSeed = randomSeed == 0 ? block.number : randomSeed;
(address hintAddress, ,) = hintHelpers.getApproxHint(partialHintNicr, searchIterations, randomSeed);
(upperHint, lowerHint) = sortedTroves.findInsertPosition(partialHintNicr, hintAddress, hintAddress);
}
}

10
test/liquity.js
View File

@ -164,12 +164,14 @@ describe("InstaLiquityResolver", () => {
describe("getTrovePositionHints()", () => {
it("returns the upper and lower address of Troves nearest to the given Trove", async () => {
const collateral = hre.ethers.utils.parseEther("10");
const debt = hre.ethers.utils.parseUnits("5000", 18);
const debt = hre.ethers.utils.parseUnits("5000", 18); // 5,000 LUSD
const searchIterations = 10;
const randomSeed = 3;
const [upperHint, lowerHint] = await liquity.getTrovePositionHints(
collateral,
debt,
searchIterations
searchIterations,
randomSeed
);
expect(upperHint).eq(expectedTrovePositionHints.upperHint);
@ -182,6 +184,7 @@ describe("InstaLiquityResolver", () => {
const amount = hre.ethers.utils.parseUnits("10000", 18); // 10,000 LUSD
const oracleEthPrice = await liquityPriceOracle.callStatic.fetchPrice();
const searchIterations = 10;
const randomSeed = 3;
const [
partialRedemptionHintNicr,
firstHint,
@ -190,7 +193,8 @@ describe("InstaLiquityResolver", () => {
] = await liquity.getRedemptionPositionHints(
amount,
oracleEthPrice,
searchIterations
searchIterations,
randomSeed
);
expect(partialRedemptionHintNicr).eq(